Hmm... I have no idea, although you might be on to something: they didn't add any Sundays in August, which might suggest that the August dates (except for the first one or two, which are attractive to the bloggers and to others who enjoy being the first to do something) weren't hugely popular to begin with. Of course, that's what I want to believe, because our date would be 8/24... although that doesn't rule out Disney raising capacity on those earlier dates once they start to fill up at some point in the future... although APH events didn't always sell out in the past, this year the pent-up demand would seem to almost guarantee that all BB dates will eventually be sold out.
I do hope you'll post here after you go and let us know how it went.